Automates registering proxy on macOS. Partially closes #49 (#429)

Author: waldekmastykarz

dev-proxy/ProxyEngine.cs

@@ -14,6 +14,12 @@
 
 namespace Microsoft.DevProxy;
 
+enum ToggleSystemProxyAction
+{
+    On,
+    Off
+}
+
 public class ProxyEngine {
     private readonly PluginEvents _pluginEvents;
     private readonly ILogger _logger;
@@ -37,6 +43,30 @@ public ProxyEngine(ProxyConfiguration config, ISet<UrlToWatch> urlsToWatch, Plug
         _logger = logger ?? throw new ArgumentNullException(nameof(logger));
     }
 
+    private void ToggleSystemProxy(ToggleSystemProxyAction toggle, string? ipAddress = null, int? port = null)
+    {
+        var bashScriptPath = Path.Join(ProxyUtils.AppFolder, "toggle-proxy.sh");
+        var args = toggle switch
+        {
+            ToggleSystemProxyAction.On => $"on {ipAddress} {port}",
+            ToggleSystemProxyAction.Off => "off",
+            _ => throw new NotImplementedException()
+        };
+
+        ProcessStartInfo startInfo = new ProcessStartInfo()
+        {
+            FileName = "/bin/bash",
+            Arguments = $"{bashScriptPath} {args}",
+            RedirectStandardOutput = true,
+            UseShellExecute = false,
+            CreateNoWindow = true
+        };
+
+        var process = new Process() { StartInfo = startInfo };
+        process.Start();
+        process.WaitForExit();
+    }
+
     public async Task Run(CancellationToken? cancellationToken) {
         if (!_urlsToWatch.Any()) {
             _logger.LogInfo("No URLs to watch configured. Please add URLs to watch in the devproxyrc.json config file.");
@@ -88,6 +118,10 @@ public async Task Run(CancellationToken? cancellationToken) {
             _proxyServer.SetAsSystemHttpProxy(_explicitEndPoint);
             _proxyServer.SetAsSystemHttpsProxy(_explicitEndPoint);
         }
+        else if (RunTime.IsMac)
+        {
+            ToggleSystemProxy(ToggleSystemProxyAction.On, _config.IPAddress, _config.Port);
+        }
         else {
             _logger.LogWarn("Configure your operating system to use this proxy's port and address");
         }
@@ -230,6 +264,11 @@ private void StopProxy() {
 
                 _proxyServer.Stop();
             }
+
+            if (RunTime.IsMac)
+            {
+                ToggleSystemProxy(ToggleSystemProxyAction.Off);
+            }
         }
         catch (Exception ex) {
             _logger.LogError($"Exception: {ex.Message}");

dev-proxy/dev-proxy.csproj

@@ -50,6 +50,9 @@
     <None Update="devproxyrc.json">
       <CopyToOutputDirectory>Always</CopyToOutputDirectory>
     </None>
+    <None Update="toggle-proxy.sh">
+      <CopyToOutputDirectory>Always</CopyToOutputDirectory>
+    </None>
     <None Update="picture.jpg">
       <CopyToOutputDirectory>Never</CopyToOutputDirectory>
     </None>

dev-proxy/toggle-proxy.sh

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+toggle=$1
+ip=$2
+port=$3
+
+network_services=$(networksetup -listallnetworkservices | tail -n +2)
+
+if [[ "$toggle" == "on" ]]; then
+  while IFS= read -r service; do
+    networksetup -setsecurewebproxy "$service" $ip $port
+  done <<<"$network_services"
+elif [[ "$toggle" == "off" ]]; then
+  while IFS= read -r service; do
+    networksetup -setsecurewebproxystate "$service" off
+  done <<<"$network_services"
+else
+  echo "Set the first argument to on or off."
+fi